| 摘要 |
PURPOSE:To correct the imbalance weight by charging the rolling bodies having the sufficient weight for correcting the imbalance weight of a rotary body inside an annular space formed around the shaft center of the rotary body and allowing said rolling bodies to transfer during revolution. CONSTITUTION:A balance device 3 fitted with the stepped part 2 formed on a rotary shaft 1 is constituted of an annular hollow part 6 and rolling bodies 7 filling the inside of the hollow part 6. When the rotary shaft 1 is revolved, also the balance device 3 revolves, and a number of rolling bodies 7 filling the inside of the annular space 6 are pushed onto the outer wall of the body 3a by a centrifugal force. Though the rotary shaft 1 is vibrated by the imbalance weight, the rolling bodies 7 transfer in the annular space 6 by the vibration, and the imbalance weight of the rotary shaft 1 is automatically corrected, and the rolling bodies 7 stop at those positions. |
